lacuna

Examples of lacuna in the following topics:

• Postnatal Bone Growth

  • Zone of cell proliferation: Closer to the marrow cavity, chondrocytes in this region multiply and arrange themselves into longitudinal columns of flattened lacunae.
  • The walls of the matrix between the lacunae become very thin.
  • Minerals are deposited in the matrix between the columns of lacunae, but are not the permanent bone mineral deposits.
  • This acts as a temporary support for the cartilage that would otherwise be weakened due to the breakdown of the lacunae.
  • Zone of bone deposition (ossification): The walls between the lacunae break down and the chondrocytes die.

• Connective Tissues: Bone, Adipose, and Blood

  • Osteocytes are found in lacunae of the bone and assist in maintenance of the bone.
  • Small spaces between these circles are called lacunae.
  • Between the lacunae are microchannels called canaliculi; they connect the lacunae to aid diffusion between the cells .
  • Between the lamellae are cavities called lacunae.
  • Canaliculi are microchannels connecting the lacunae together.

• Cartilage Growth

  • The chondroblasts then trap themselves in lacunae, small spaces that are no longer in contact with the newly created matrix and contain extracellular fluid.
  • Once damaged, cartilage has limited repair capabilities because chondrocytes are bound in lacunae and cannot migrate to damaged areas.

• Connective Tissues: Loose, Fibrous, and Cartilage

  • Chondrocytes are found in spaces within the tissue called "lacunae. "
  • The lacunae are randomly scattered throughout the tissue and the matrix takes on a milky or scrubbed appearance with routine stains .
  • The chondrocytes exist in cavities in the matrix called lacunae.

• Lumbar Plexus

  • The lateral femoral branch is purely sensory and pierces the vascular lacuna near the saphenous hiatus and supplies the skin below the inguinal ligament.
  • Medial to the anterior superior iliac spine, it leaves the pelvic area through the lateral muscular lacuna and enters the thigh by passing behind the lateral end of the inguinal ligament.
  • It exits the pelvis through the medial aspect of the muscular lacuna.

• Sinusoid Development

  • The invasion of endometrial sinusoids by the trophoblast allows maternal blood flow into the trophoblastic lacunae; this forms the uteroplacental circulation.

• Development of the Extraembryonic Coelom

  • As development progresses, small lacunae begin to form within the extraembryonic mesoderm which become larger and form the extraembryonic celom.

• Cell Types in Bones

  • Each osteocyte is located in a space (lacuna) surrounded by bone tissue.

• Supply of Blood and Nerves to Bone

  • The Haversian canals also surround nerve cells throughout the bone and communicate with osteocytes in lacunae (spaces within the dense bone matrix that contain the living bone cells) through canaliculi.

• Embryonic and Fetal Bone Formation